KXBC3 behavior
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Hi Rich
Thanks input. When it stopped charging, it is very unlikely that batteries reached 45C. I felt no abnormal temperature. The case was as warm as it was one hour earlier. As I said, no error message was issued. The charging never resumed. I have depleted the batteries and went thru a 16hours charging cycle. Close to 12 hours latter, same thing happened again. Charge stopped. I have emailed the factory couple days ago and I am waiting their input on it. Regards Fred PY2XB Fred, Most likely the battery temperature got up to 45 degrees C and charging was suspended until they cooled to 40 C. Normally a message should appearwhen that happens. 73, Rich AC7MA On 02/01/2013 12:02 PM, Fred Carvalho wrote: >* Hi Folks. Sorry if this has been asked/explained before.*>* I have installed the KXBC3 NiMH Battery Charger module. I am using 2300mh/h*>* NiMH AA cells.*>* I have plugged a bench power supply with voltage/amp meters so I can check*>* what is going on. My cells were not empty, so I have chosen 4 hours charge.*>* I set the PS to 14VDC. The PS amp meter reads 390mA during the charging,*>* which is about 190mA for the rig RX drain plus 200mA for the batteries. So*>* far so good.*>* I monitor the elapsed time in the MENU/BAT CHG and the BAT voltage, which*>* goes up to 11.7V. After 1 hour and so, the elapsed time chronometer stops.*>* The PS amp meter reads only 190mA. So it seems that the charger stopped*>* charging. That is in-line with the fact that the battery was somewhat*>* charged.*>* I go to MENU/BAT CHG and turn the charger OFF. I also unplug the power*>* supply. The battery voltage drops to 11V on the screen.*>* In any phase of the process I got no error message.*>** >* Is this an expected behavior ? I have not seen anywhere an explanation of*>* what happens if the battery is totally charged. Is the counter supposed to*>* stop, or it should keep on sending charge to the battery until the total*>* programmed time elapses?.*>**>* Any input is appreciated. Thanks*> -- Fred - PY2XB *Other Calls*: PY2FXH, PY2FXH/W2, PY2XB/0, F/PY2XB, ZX2XB, PT7BXB, PY2XB/PY0F, PQ0F, VP5/PY2XB, PW2IO (SA-071), ZX8W (SA-060), PY2XB/1 (SA-029), 8P9XB, PQ8XB (SA-045), ZX2S (SA-028); W4/PY2XB, 3D2XB *Team member*: PW2M (SA-071), PX8J (SA-041), T30PY/T30SIX, PT0S ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hello Fred,
I've seen a few oddities in the battery charger also. I think some variables that you change don't have immediate effect for some reason I've not bothered to investigate. Try setting the charging parameters you want, then exit the menus and turn the KX3 off with the 2 button salute. Then turn it back on and start the charge cycle. Regards, Peter VK4JD -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Fred Carvalho Sent: Wednesday, 6 February 2013 8:25 AM To: [hidden email] Subject: [Elecraft] KXBC3 behavior Hi Rich Thanks input. When it stopped charging, it is very unlikely that batteries reached 45C. I felt no abnormal temperature. The case was as warm as it was one hour earlier. As I said, no error message was issued. The charging never resumed. I have depleted the batteries and went thru a 16hours charging cycle. Close to 12 hours latter, same thing happened again. Charge stopped. I have emailed the factory couple days ago and I am waiting their input on it. Regards Fred PY2XB Fred, Most likely the battery temperature got up to 45 degrees C and charging was suspended until they cooled to 40 C. Normally a message should appearwhen that happens. 73, Rich AC7MA On 02/01/2013 12:02 PM, Fred Carvalho wrote: >* Hi Folks. Sorry if this has been asked/explained before.*>* I have >installed the KXBC3 NiMH Battery Charger module. I am using 2300mh/h*>* >NiMH AA cells.*>* I have plugged a bench power supply with voltage/amp >meters so I can check*>* what is going on. My cells were not empty, so >I have chosen 4 hours charge.*>* I set the PS to 14VDC. The PS amp >meter reads 390mA during the charging,*>* which is about 190mA for the >rig RX drain plus 200mA for the batteries. So*>* far so good.*>* I >monitor the elapsed time in the MENU/BAT CHG and the BAT voltage, >which*>* goes up to 11.7V. After 1 hour and so, the elapsed time >chronometer stops.*>* The PS amp meter reads only 190mA. So it seems >that the charger stopped*>* charging. That is in-line with the fact >that the battery was somewhat*>* charged.*>* I go to MENU/BAT CHG and >turn the charger OFF. I also unplug the power*>* supply. The battery >voltage drops to 11V on the screen.*>* In any phase of the process I >got no error message.*>** of*>* what happens if the battery is totally charged. Is the counter supposed to*>* stop, or it should keep on sending charge to the battery until the total*>* programmed time elapses?.*>**>* Any input is appreciated. Thanks*> -- Fred - PY2XB *Other Calls*: PY2FXH, PY2FXH/W2, PY2XB/0, F/PY2XB, ZX2XB, PT7BXB, PY2XB/PY0F, PQ0F, VP5/PY2XB, PW2IO (SA-071), ZX8W (SA-060), PY2XB/1 (SA-029), 8P9XB, PQ8XB (SA-045), ZX2S (SA-028); W4/PY2XB, 3D2XB *Team member*: PW2M (SA-071), PX8J (SA-041), T30PY/T30SIX, PT0S ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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